package com.zuul.filter;

import com.netflix.zuul.ZuulFilter;
import com.netflix.zuul.context.RequestContext;
import com.netflix.zuul.exception.ZuulException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;

import javax.servlet.http.HttpServletRequest;

@Component
public class MyFilter extends ZuulFilter {
    private static Logger log = LoggerFactory.getLogger(MyFilter.class);
    @Override
    public String filterType() {
//        filterType：返回一个字符串代表过滤器的类型
//        pre：路由之前
//        routing：路由之时
//        post： 路由之后
//        error：发送错误调用
        return "pre";
    }

    //过滤的顺序
    @Override
    public int filterOrder() {
        return 0;
    }

    //这里可以写逻辑判断，是否要过滤，true,永远过滤。
    @Override
    public boolean shouldFilter() {
        return true;
    }

    @Override
    public Object run() throws ZuulException {
//        RequestContext ctx = RequestContext.getCurrentContext();
//        HttpServletRequest request = ctx.getRequest();
//        log.info(String.format("%s >>> %s", request.getMethod(), request.getRequestURL().toString()));
//        Object accessToken = request.getParameter("token");
//        if(accessToken == null) {
//            log.warn("token is empty");
//            ctx.setSendZuulResponse(false);
//            ctx.setResponseStatusCode(401);
//            try {
//                ctx.getResponse().getWriter().write("token is empty");
//            }catch (Exception e){}
//
//            return null;
//        }
//        log.info("ok");
        return null;
    }
}
